The Research And Development Of High-Voltage Electric Energy Measuring Device

Because of the flaw in the principle or the technology, traditional electric energy measuring device has all sorts of deficiencies, and the measuring error is big. This article has analyzed the current development state of electric energy measuring device and the correlative technique in domestic and foreign, has designed a new kind of electronic multi-function electric energy measuring device, which is fit for high-voltage condition. The electronic electric energy measuring device is accurate in the measuring, compact in the structure, low in the cost, and can realize the time sharing measuring of the quantity of electricity, monitor the electric network function in real-time; can enhance the rationality of the utilization of electric energy, abate the contradiction of supply and demand of the electric power, prevent the occurrence of stealing the electricity effectively.This article first introduces the measuring principle of alternating current parameter and the operating principle of the electric energy measuring device, and then elaborates the hardware and software design and implementations of the electronic multi-function electric energy measuring device. The hardware use MCU and ASIC, on that function, we utilize modularization method to realize the root mean square value of voltage and current , the time sharing measuring of active power and reactive power, anomaly detection and recording, etc. Considering the factors of function, power consumption and cost, the system uses PCB Rogowski air-core coil to transform current, advanced eight-bite MCU PIC16F877 with SPI interface of Microchip company to deal with the data, while measurement IC uses the new energy measurement IC ADE7753 of ADI company. Based on this, author builds experimental hardware platform, has realized the SPI communication between MCU and energy measurement IC by programming, and the time sharing measuring, displaying, storage of the quantity of electricity. In final, the article discusses the system's anti-interference and the digitized calibration.This topic's research has provided a new choice for the electric energy measuring and the electrical power system automatic management, and has remarkable economic efficiency and broad market prospect.